Would a 2x4 engine work with a 4x4 system

What is your question?

I bought a new engine the junkyard said a 2x4 wheel engine would work with my jeep when mine was a 4x4 but it doesn’t seem like it does

What makes this problem better or worse?

Worse

How long has your 2018 Jeep Grand Cherokee had this problem?

Since I installed it